当SelectionMode = FullRowSelect时,如何突出显示DataGridView中的当前单元格

private void dataGridView1_SelectionChanged(object sender, EventArgs e)
{
    if (dataGridView1.SelectedRows.Count > 0)
    {
        dataGridView1.CurrentCell.Style.BackColor = Color.Yellow;
    }
}

private void dataGridView1_SelectionChanged(object sender, EventArgs e)
{
    if (dataGridView1.SelectedRows.Count > 0)
    {
        dataGridView1.CurrentCell.Style.BackColor = Color.Yellow;
    }
    else
    {
        dataGridView1.CurrentCell.Style.BackColor = Color.White;
    }
}